yeah u pretty much have to have someone who does it for a living, or know alot about doing speaker wireing. i know a manager at circuit city here and when i got my new deck he did everything i needed to get it up and going. he did tell me that i couldnt hook up a after market amp, but my deck has one built in it. also, like i was saying about adding speakers he told me that either i had to get a entire new system wired in the car(butt loads of money), or i could add subs and other speakers but they would work on there own network. they can work together in a sense of being on at the same time but they wont all be controled together. it just isnt worth it getting the entire car rewired, im having a custom box with 2 12's made with its own amp, and ill just add it to what i have. like i said the bose sounds great and they are high end speakers its just the concept they are made behind. if u ever go to any bose store u will see what i mean, they make their speakers so sounds are crisper than usual, meaning they filter alot of background noise, i cant explain it that well but any stereo junky could make it sound understandable.